Amino acid organic fertilizer N-P-K-S:13-1-2-10 specification :2-4mm Amino acid organic fertilizer Amino acid organic ... high ( the organic matter more than 20%, amino acids 10% above), promoting nutrient absorption and utilization, so that ... improvement, alleviate salt.Main index:Size:2-4MM, N : 1 3 % , P :1%, K: 2% S : 1 0%,Organic matter:16%; ... -proof. Amino acid organic fertilizer (N-P-K-S:13-1-2-10)